As far as I remember, this is just a repost of your previous post. Please, if nobody answers, there is a reason. Your question is far too general and as you state that Asterisk is doing the billing and your question is a billing question, I suggest you try to Asterisk list.
g-)

Jai Rangi wrote:

Hello,
I have a ser and asterisk setup. Users register on ser and all the national and international calls go through asterisk. Asterisk handles the billing part for long distance calls. Now I got an issue with call forwarding. Here is the situation.
Useragent A calls Usergent B. User B has setup the call the call forwarding to his cell phone. So when user A calls user B, ser check that user B has set the forwarding and send the call to Asterisk box. Asterisk box sees user A in the callerID and bills user A for that call. We want user B to be billed for that call, cause he is forwarding the calls to his cell phone (long distance number).
How can I achieve this.

Thank you,
-Jai
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